22 */
23
24 #include "precompiled.hpp"
25 #include "jvm.h"
26 #include "gc/g1/g1CollectedHeap.inline.hpp"
27 #include "gc/g1/satbMarkQueue.hpp"
28 #include "gc/shared/collectedHeap.hpp"
29 #include "memory/allocation.inline.hpp"
30 #include "oops/oop.inline.hpp"
31 #include "runtime/mutexLocker.hpp"
32 #include "runtime/safepoint.hpp"
33 #include "runtime/thread.hpp"
34 #include "runtime/threadSMR.hpp"
35 #include "runtime/vmThread.hpp"
36
37 SATBMarkQueue::SATBMarkQueue(SATBMarkQueueSet* qset, bool permanent) :
38 // SATB queues are only active during marking cycles. We create
39 // them with their active field set to false. If a thread is
40 // created during a cycle and its SATB queue needs to be activated
41 // before the thread starts running, we'll need to set its active
42 // field to true. This is done in G1SATBCardTableLoggingModRefBS::
43 // on_thread_attach().
44 PtrQueue(qset, permanent, false /* active */)
45 { }
46
47 void SATBMarkQueue::flush() {
48 // Filter now to possibly save work later. If filtering empties the
49 // buffer then flush_impl can deallocate the buffer.
50 filter();
51 flush_impl();
52 }
53
54 // Return true if a SATB buffer entry refers to an object that
55 // requires marking.
56 //
57 // The entry must point into the G1 heap. In particular, it must not
58 // be a NULL pointer. NULL pointers are pre-filtered and never
59 // inserted into a SATB buffer.
60 //
61 // An entry that is below the NTAMS pointer for the containing heap
62 // region requires marking. Such an entry must point to a valid object.
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22 */
23
24 #include "precompiled.hpp"
25 #include "jvm.h"
26 #include "gc/g1/g1CollectedHeap.inline.hpp"
27 #include "gc/g1/satbMarkQueue.hpp"
28 #include "gc/shared/collectedHeap.hpp"
29 #include "memory/allocation.inline.hpp"
30 #include "oops/oop.inline.hpp"
31 #include "runtime/mutexLocker.hpp"
32 #include "runtime/safepoint.hpp"
33 #include "runtime/thread.hpp"
34 #include "runtime/threadSMR.hpp"
35 #include "runtime/vmThread.hpp"
36
37 SATBMarkQueue::SATBMarkQueue(SATBMarkQueueSet* qset, bool permanent) :
38 // SATB queues are only active during marking cycles. We create
39 // them with their active field set to false. If a thread is
40 // created during a cycle and its SATB queue needs to be activated
41 // before the thread starts running, we'll need to set its active
42 // field to true. This is done in G1SBarrierSet::on_thread_attach().
43 PtrQueue(qset, permanent, false /* active */)
44 { }
45
46 void SATBMarkQueue::flush() {
47 // Filter now to possibly save work later. If filtering empties the
48 // buffer then flush_impl can deallocate the buffer.
49 filter();
50 flush_impl();
51 }
52
53 // Return true if a SATB buffer entry refers to an object that
54 // requires marking.
55 //
56 // The entry must point into the G1 heap. In particular, it must not
57 // be a NULL pointer. NULL pointers are pre-filtered and never
58 // inserted into a SATB buffer.
59 //
60 // An entry that is below the NTAMS pointer for the containing heap
61 // region requires marking. Such an entry must point to a valid object.
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